Threading die



, June 26,1928; 1,675,259

G. E. EASTHAM DDDDDDDDDD IE Patented June 26,1928. e i 1,675,259

UNITED STATES PATENT OFFICE.

GEORGE ELMER `EASTHAM, OF EVANSVILLE, INDIANA.

THR-EADING DIE.v

Application iled J'anua1y-18, 1927. Serial'No. 161,809.

This invention relates to threading dies. The chuck for holding the sections 1 and The object ot my invention is to provide 2 locked tightly together in closed position, an improved threading die which can be appears at 6 and is provided with a set screw opened out to permit sharpening of the cut- 7 for clamping thc die against rotation in 5 ters thereof by a high speed emery Wheel, said ring or chuck G. 'I he entire die and 50 thus enabling the die to be used for an inring or chuck, as shown yin Fig. 2, are held definite period, if repeatedly re-sharpened. as a unit in the 'die stock or other hand or A convenient construction, embodying the machine appliance utilized for holding and invention, comprises a two-part die whose turning the die'ltor a threading operation. parts or sections are hinged together, ena- Other means than the ring 6 and screw '7 55 bling the sections to be opened out when remay be employed for holding the die secsharpening of the cutters becomes nccestions l and 2 locked tightly together. sary, and means for locking the sections to- The die may .be opened out as shown in gether for use. `One such locking means is Fig. 4, when 1t is removed from the lring 6,

l that hereinafter described, namely, a ringand this enables it to be re-sharpened at any 60 n like holder or chuck which is adapt-ed to time by using a high-speed einery wheel as encircle the die-sections when they are illustrated in Fig. 8 which, however', shows closed. the re-sharpening of themodified form of In the accompanying drawings: die illustrated in Figs. 5 to 7 inclusive.

Figure l, is a face view of the die when Instead of the particular hinge connec- 65 closed; tion shown in Figs. l to 4 inclusive, the sec'- Fig. 2, is a similar view, showing the die tions l and 2 may be connected by a link locke-d in its chuck; 8 which is hinged to the sections at 9, as Fig. 3, is an edge view of the die, showillustrated in Figs. 5 to 8 inclusive. `The die ing the hinge; of Figs. 5 to 8. will be held in a chuck or 7u Fig. 4, is a face View of lthe die, opened ring as shown 1n Fig. 2.

out; When the die becomes worn, it is removed Fig. 5, is a view like Fig. l, showing a from the ring or chuck 6, opened out as modification; shown in Fig. 8 and re-sharpened by the 3o Fig. 6, is a face view of the die of Fig. 5, emery wheel 10, and then replaced in the 75 Opened out; ring 6 for further use.

Fig. 7, is an edge view of the die of Fig. What I claim, is: 5, showing the hinge thereof; and A threading die comprising threading sec- Fig. 8, is a view lshowing the die of Fig. tions which are hinged together and whose 5, opened out and being ground or re-sharpfree ends abut, a ring in which, when said 8o cned by a high-Speed emery Wheel. hinged abutting sections are placed, they are Referring first to Figs. 1 to 4 inclusive, inheld in closed and immovable position, and stead 0i the die being in a single, solid piece, means for locking the sections in immovit is in secti-onsl and 2 hinged together in able and closed arrangement in -said ring so any'suitable manner at 3, one of the sections that they are unitary with the ring, enasa having a cut-away part 4 to permit full bling the sections andthe ring to be applied opening of the two sections as shown in to, ory removed from,a die stock as aunit.

1g. 4. In testimony whereoil I aiiix my signature. The free ends of the sections have flat mating faces indicated at 5. GEORGE ELMER EASTHAM. 

